Adesso Antimicrobial Waterproof Numeric Keypad with Wrist Rest Support - Cable Connectivity - USB Interface - 18 Key - MAC - Windows, Mac OS - Membrane Keyswitch - Black - AKB-618UB

Waterproof Design - The Adesso AKB-618 keypad has a design where there are no gaps, holes, or slots so water or liquids cannot get throgh or seep through. Accidental spills aren't damaging to the circuitry inside so you can still enjoy the keypad for years to come.
Ergonomic Design - The design of this keypad with gently sloped shape and wrist rest encourages the natural positioning of your hand, wrist, and forearm for maximum comfort each and everytime you use it.
Antimicrobial - Made with antimicrobial material which prevents the growth of harmful bacteria and protects against the buildup germs between washings.
Quiet Membrane Switches - Membrane key switches are a top of the line design when it comes to any keyboard or keypad. With the smooth action of the membrane keys you can input faster than you have every imagined smoothly and productively with minimal clicking and noise. In addition the key switches are rated at 5 million keystrokes with a 45-50g actuation force.
Plug N Play - This Adesso AKB-618 is plug n play which means no driver installations, no extra steps in using your keypad. Simply plug it in a your Windows or Mac based Operating System will automatically assign it a driver and within 30 seconds you are ready to start typing.